Ultrathin MoS2 Nanosheets Encapsulated in Hollow Carbon Spheres: A Case of a Dielectric Absorber with Optimized Impedance for Efficient Microwave Absorption
文献类型：期刊论文
| 作者 | Ning, Mingqiang; Man, Qikui; Tan, Guoguo; Lei, Zhenkuang; Li, JingBo; Li, Run-Wei |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2020 |
| 卷号 | 12期号:18页码:20785-20796 |
| 关键词 | FACILE SYNTHESIS PERFORMANCE COMPOSITE EXCELLENT PROPERTY FOAM NANOPARTICLES PERMITTIVITY ARCHITECTURE ENHANCEMENT |
| DOI | 10.1021/acsami.9b20433 |
| 英文摘要 | A dielectric loss-type electromagnetic wave (EMW) absorber, especially over a broad frequency range, is important yet challenging. As the most typical dielectric attenuation absorber, carbon-based nanostructures were highly pursued and studied. However, their poor impedance-matching issues still exist. Here, to further optimize dielectric properties and enhance reflection loss, ultrathin MoS2 nanosheets encapsulated in hollow carbon spheres (MoS2@HCS) were prepared via a facile template method. The diameter and shell thickness of the as-prepared HCSs were similar to 250 and similar to 20 nm. The encapsulated MoS2 nanosheets presented high dispersity and crystallinity. Compared to a pure HCS or MoS2 absorber, MoS2@HCS exhibited an optimized impedance characteristic, which can be attributed to the synergistic effects between HCSs (ensuring rapid electron transmission and compensating the low conductivity of MoS2) and MoS2 nanosheets (exposing sufficient numbers of active sites for polarizations and multi-reflection). Consequently, the MoS2@HCS was endowed with -65 dB EMW attenuation ability under 2 mm and the effective attenuation bandwidth under -20 dB was similar to 3.3 GHz over the K-band under 1.2 mm and similar to 3.4 GHz over the Ka-band under merely 0.7 mm. These results suggested that the MoS2@HCS is a promising dielectric absorber for practical applications. Meanwhile, this work introduces a facile and versatile strategy, which could in principle be extended to other transition metal sulfide@HCS for designing novel EMW absorbers. |
| 学科主题 | Science & Technology - Other Topics ; Materials Science |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/19662]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Man, QK 2.Tan, GG (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China. 3.Tan, GG (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Zhejiang, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Ning, Mingqiang,Man, Qikui,Tan, Guoguo,et al. Ultrathin MoS2 Nanosheets Encapsulated in Hollow Carbon Spheres: A Case of a Dielectric Absorber with Optimized Impedance for Efficient Microwave Absorption[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(18):20785-20796. |
| APA | Ning, Mingqiang,Man, Qikui,Tan, Guoguo,Lei, Zhenkuang,Li, JingBo,&Li, Run-Wei.(2020).Ultrathin MoS2 Nanosheets Encapsulated in Hollow Carbon Spheres: A Case of a Dielectric Absorber with Optimized Impedance for Efficient Microwave Absorption.ACS APPLIED MATERIALS & INTERFACES,12(18),20785-20796. |
| MLA | Ning, Mingqiang,et al."Ultrathin MoS2 Nanosheets Encapsulated in Hollow Carbon Spheres: A Case of a Dielectric Absorber with Optimized Impedance for Efficient Microwave Absorption".ACS APPLIED MATERIALS & INTERFACES 12.18(2020):20785-20796. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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